OPTICAL SYSTEMS DESIGN
DOC ID: 10102908
OSD730 OPERATOR MANUAL
Page 12
2.2.6
OTHER CONNECTIONS
Pin 22 of the high density DB44 connector provides a TTL level Optical receive power status indication, for
electrical monitoring of the optical link, if it is desired.
The optical fiber should be terminated by the appropriate optical connector. Before connection, inspect the end
of the connectors to ensure that no dust or dirt is present as it could contaminate the modem connector and result
in poor performance.
If it is necessary to clean the cable connectors make use of isopropyl alcohol and a lint-free tissue to remove
contamination.
2.2.7
LINK SETTINGS
TABLE 6: LINK SETTINGS AND THEIR EFFECTS
LINK
FUNCTION
SETTING
LK6 – LK9
Non Inverted RS232 Output Data Signal, CH1 – CH4
LK: 1 to 2
LK6 – LK9
Inverted RS232 Output Data Signal, CH1 – CH4
LK: 2 to 3
LK10 – LK13
RS232 Data Output, CH1 – CH4
LK: 1 to 2
LK10 – LK13
RS422 Data Output, CH1 – CH4
LK: 2 to 3
LK1 – LK4
Audio Input Impedance 600R, CH1 – CH4
LK: In
LK1 – LK4
Audio Input Impedance 10K, CH1 – CH4
LK: Out
LK5
Factory Set
Default
LK14
Factory Set
Default
Please note that LK5 and LK14 are factory set and has no end user function. Configuring an OSD730 for
different data protocols or different audio input impedances user should not alter the setting of these links.
Default settings for links 6 to 9 is set for non-inverting output data. This would be changed in the case of using
MIL-STD 188 data instead of RS232, and in the case of having RS422 at one end of the fiber link and RS232 at
the other end.
